Direction of a line in 3D | 3D Geometry | Grade 12 | Math | Khan Academy

Описание: In this video, we'll look at ways to find direction ratios of a line in 3D. We first understand what they are and how they related to direction ratios. We then find the direction cosines given a set of direction ratios. We then try to find the direction cosines od a line passing through 2 given points. Finally, we try to find the direction cosines of a line making certain angles with the axes.

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Timestamps:
0:00 Direction cosines from direction ratios
4:20 Direction cosines of a line passing through 2 points
7:34 Direction cosines of a line making certain angles with axes

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Created by Ashish Gupta